Bump com.mysql:mysql-connector-j in /modules/junit-jupiter

Bumps [com.mysql:mysql-connector-j](https://github.com/mysql/mysql-connector-j) from 9.5.0 to 9.6.0.
- [Changelog](https://github.com/mysql/mysql-connector-j/blob/release/9.x/CHANGES)
- [Commits](mysql/mysql-connector-j@9.5.0...9.6.0)

---
updated-dependencies:
- dependency-name: com.mysql:mysql-connector-j
  dependency-version: 9.6.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

modules/junit-jupiter/build.gradle

@@ -15,5 +15,5 @@ dependencies {
     }
 
     testRuntimeOnly 'org.postgresql:postgresql:42.7.8'
-    testRuntimeOnly 'com.mysql:mysql-connector-j:9.5.0'
+    testRuntimeOnly 'com.mysql:mysql-connector-j:9.6.0'
 }